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File: Competencies Pdf 176060 | 978 1 58503 851 0 2
chapter 2 isometric projection and multi view drawings below are the desired outcomes and usage competencies based on the completion of chapter 2 desired outcomes usage competencies understand isometric identify ...

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                         Chapter 2 
                         Isometric Projection and Multi View Drawings 
                         Below are the desired outcomes and usage competencies based on the completion of 
                         Chapter 2.  
                          Desired Outcomes:                       Usage Competencies:  
                          •   Understand Isometric                •   Identify the three main projection divisions in 
                              Projection and 2D sketching.            freehand engineering sketches and drawings: 
                                                                      o  Axonometric, Oblique, and Perspective 
                          •   Knowledge of additional             •   Create one and two view drawings. 
                              Projection views and 
                              arrangement of drawing 
                              views. 
                          •   Comprehend the history and          •   Identify the development of in historic CAD 
                              evolution of CAD and the                systems and SolidWorks features, parameters 
                              development of SolidWorks.              and design intent of a sketch, part, assembly 
                                                                      and drawing.  
                          •   Recognize Boolean operations 
                              and feature based modeling.         •   Apply the Boolean operation: Union, 
                                                                      Difference and Intersection.  
                                                                      PAGE 2 - 1                                            
                 Isometric Projection and Multi View Drawings          Engineering Graphics with SolidWorks 2014 
                  
                  
                 Notes: 
                                                             PAGE 2 - 2                                            
                         Engineering Graphics with SolidWorks 2014                Isometric Projection and Multi View Drawings 
                          
                         Chapter 2 - Isometric Projection and Multi View Drawings 
                         Chapter Overview 
                         Chapter 2 provides a general introduction into Isometric Projection and Sketching along 
                         with Additional Projections and arrangement of views. It also covers advanced drawing 
                         views and an introduction from manual drafting to CAD.  
                         On the completion of this chapter, you will be able to: 
                         •   Understand and explain Isometric Projection. 
                         •   Create an Isometric sketch. 
                         •   Identify the three main projection divisions in freehand engineering sketches and 
                             drawings: 
                             o  Axonometric 
                             o  Oblique 
                             o  Perspective 
                         •   Comprehend the history and evolution of CAD. 
                         •   Recognize the following Boolean operations: Union, Difference, and Intersection. 
                         •   Understand the development of SolidWorks features, parameters and design intent of 
                             a sketch, part, assembly and drawing. 
                         Isometric Projections 
                         There are three main projection divisions commonly used in freehand engineering 
                         sketches and detailed engineering drawings; they are: 1.) Axonometric, with its divisions 
                         in Isometric, Dimetric and Trimetric, 2.) Oblique, and 3.) Perspective. Let’s review the 
                         three main divisions. 
                         Axonometric is a type of parallel projection, more specifically a type of Orthographic 
                         projection, used to create a pictorial drawing of an object, where the object is rotated 
                         along one or more of its axes relative to the plane of projection.  
                         There are three main types of axonometric projection: Isometric, Dimetric, and Trimetric 
                         projection depending on the exact angle at which the view deviates from the Orthogonal. 
                              To display Isometric, Dimetric, or 
                         Trimetric of a 3D SolidWorks model, select the 
                         drop-down arrow from the View Orientation 
                             icon in the Heads-up view toolbar. 
                                                                      PAGE 2 - 3                                            
                 Isometric Projection and Multi View Drawings          Engineering Graphics with SolidWorks 2014 
                  
                  
                 Axonometric drawings often appear distorted because they ignore the foreshortening 
                 effects of perspective (foreshortening means the way things appear to get smaller in both 
                 height and depth as they recede into the distance). Typically; Axonometric drawings use 
                 vertical lines for those lines representing height and sloping parallel edges for all other 
                 sides. 
                 •   Isometric Projection. Isometric projection is a method of visually representing three-
                     dimensional objects in two dimensions, in which the three coordinate axes appear 
                     equally foreshortened and the angles between them are 120 º.  
                      The term "Isometric" comes from the Greek for "equal measure", reflecting that the 
                 scale along each axis of the projection is the same (this is not true of some other forms of 
                 graphical projection).  
                  
                 •   Dimetric Projection. A Dimetric projection is created using 3 axes but only two of the 
                     three axes have equal angles. The smaller these angles are, the less we see of the top 
                     surface. The angle is usually around 105º. 
                  
                                                             PAGE 2 - 4                                            
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